Why does LED driver power supply need high efficiency?

High efficiency is the overall energy-saving requirement of the LED drive system, and is the basis and guarantee for low temperature rise, long life and high reliability.

　　(1) High efficiency, low loss, low temperature rise

　　For example, for an LED driver with an output of 100W, when the efficiency reaches 95%, its loss is 5.2W, and when the efficiency is only 85%, its loss is 17.6W. The latter is 3.4 times the former. Experiments show that under the same conditions, the former is 10~15℃ lower in temperature than the latter.

　　(2) Reduce the operating temperature of LED lamps and delay light decay

　　The increase in LED chip temperature will lead to changes in the performance of the light-emitting device and a decrease in the electro-optical conversion efficiency, and even failure in severe cases. Experimental tests have shown that for every 5°C increase in the LED's own temperature, the luminous flux decreases by 3%.

　　(3) High efficiency, low temperature rise, and long life

　　If you choose a high-temperature electrolytic capacitor with a service life of 10,000 hours at 105°C, according to the commonly used electrolytic capacitor life estimation formula "the life doubles for every 10°C decrease in temperature", its working life at 95°C is 20,000 hours, and at 85°C it is 40,000 hours. For example, when the operating temperature of the Inventronics drive power supply is generally at a maximum of 70°C, the temperature of the electrolytic capacitor is roughly controlled at around 85°C, and the life can reach 40,000 hours. If it works 12 hours a day, the life is nearly 10 years.

　　(4) High efficiency, low temperature rise, and high reliability

　　(5) As the power supply temperature decreases and the working environment of ICs and power semiconductors improves, the MTBF (mean time between failures) will increase significantly.